I ordered on 12/01/2020 a ST 520 GRAY 27.5 "MTB BI...

I ordered on 12/01/2020 a ST 520 GRAY 27.5 "MTB BIKE
299, I got it on 01/01/2020 and 01/14/2020 first round and front derailleur problem! I pay 300 for a mountain bike which does not even seem to be checked before selling it to the customer! I hired a truck from a friend to get the mountain bike. And there I will still have to move after work one evening to drop off my bike and return to pick it up another day. I hope to be contacted very quickly to find a solution!